In 1973, Premier Zhou Enlai, diagnosed with bladder cancer, returned to Yan'an after a 26-year absence. The 13 years he spent in Yan'an vividly came back to him. This land had nurtured the Chinese revolution, the People's Liberation Army, and the first generation of CPC leaders, solidifying the Party's leading position. Premier Zhou reflected on the contributions of the Yan'an people to the revolution and worried about the continuing hardships they faced. He urged the local cadres and the "sent-down youth" to contribute to the development of this revolutionary sacred land. The cadres pledged their commitment, and the sent-down youth vowed to put down roots in the yellow earth. Everyone was filled with passion and determination to improve the lives of the Yan'an people. Moved by their enthusiasm and resolve, Premier Zhou, despite his illness (which prevented him from drinking alcohol) raised a toast with everyone, solidifying their shared vow.